I added the machined Shadow hammer to a 75B (the Shadow hammer is to thick to fit the frame slot), and got great improvements in the trigger break. the comp hammer on my 75 Shadow also gives a great trigger.
Being two different guns, one with the FP interrupt and one without, it's not possible to say which hammer is "best". Others have said the CZC Comp gives slightly less camming back and creep. Both are very good triggers, and show immediate improvements over the stock ring hammer.